/*
 * Copyright 2010-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.mybatis.spring;

import static org.springframework.util.Assert.notNull;
import static org.springframework.util.Assert.state;
import static org.springframework.util.ObjectUtils.isEmpty;
import static org.springframework.util.StringUtils.hasLength;
import static org.springframework.util.StringUtils.tokenizeToStringArray;

import java.io.IOException;
import java.lang.reflect.Modifier;
import java.sql.SQLException;
import java.util.HashSet;
import java.util.Optional;
import java.util.Properties;
import java.util.Set;
import java.util.stream.Stream;

import javax.sql.DataSource;

import org.apache.ibatis.builder.xml.XMLConfigBuilder;
import org.apache.ibatis.builder.xml.XMLMapperBuilder;
import org.apache.ibatis.cache.Cache;
import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.io.VFS;
import org.apache.ibatis.mapping.DatabaseIdProvider;
import org.apache.ibatis.mapping.Environment;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.reflection.factory.ObjectFactory;
import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
import org.apache.ibatis.scripting.LanguageDriver;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.apache.ibatis.transaction.TransactionFactory;
import org.apache.ibatis.type.TypeHandler;
import org.mybatis.logging.Logger;
import org.mybatis.logging.LoggerFactory;
import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.core.NestedIOException;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.core.type.ClassMetadata;
import org.springframework.core.type.classreading.CachingMetadataReaderFactory;
import org.springframework.core.type.classreading.MetadataReaderFactory;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;
import org.springframework.util.ClassUtils;

/**
 * {@code FactoryBean} that creates a MyBatis {@code SqlSessionFactory}. This is the usual way to set up a shared MyBatis {@code SqlSessionFactory} in
 * a Spring application context; the SqlSessionFactory can then be passed to MyBatis-based DAOs via dependency injection.
 *
 * Either {@code DataSourceTransactionManager} or {@code JtaTransactionManager} can be used for transaction demarcation in combination with a
 * {@code SqlSessionFactory}. JTA should be used for transactions which span multiple databases or when container managed transactions (CMT) are being
 * used.
 *
 * @author Putthiphong Boonphong
 * @author Hunter Presnall
 * @author Eduardo Macarron
 * @author Eddú Meléndez
 * @author Kazuki Shimizu
 *
 * @see #setConfigLocation
 * @see #setDataSource
 * @desctiption 增加刷新xml文件
 */
public class SqlSessionFactoryBean implements FactoryBean<SqlSessionFactory>, InitializingBean, ApplicationListener<ApplicationEvent> {

	private static final Logger LOGGER = LoggerFactory.getLogger(SqlSessionFactoryBean.class);

	private static final ResourcePatternResolver RESOURCE_PATTERN_RESOLVER = new PathMatchingResourcePatternResolver();
	private static final MetadataReaderFactory METADATA_READER_FACTORY = new CachingMetadataReaderFactory();

	private Resource configLocation;

	private Configuration configuration;

	private Resource[] mapperLocations;

	private DataSource dataSource;

	private TransactionFactory transactionFactory;

	private Properties configurationProperties;

	private SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();

	private SqlSessionFactory sqlSessionFactory;

	// EnvironmentAware requires spring 3.1
	private String environment = SqlSessionFactoryBean.class.getSimpleName();

	private boolean failFast;

	private Interceptor[] plugins;

	private TypeHandler<?>[] typeHandlers;

	private String typeHandlersPackage;

	@SuppressWarnings("rawtypes")
	private Class<? extends TypeHandler> defaultEnumTypeHandler;

	private Class<?>[] typeAliases;

	private String typeAliasesPackage;

	private Class<?> typeAliasesSuperType;

	private LanguageDriver[] scriptingLanguageDrivers;

	private Class<? extends LanguageDriver> defaultScriptingLanguageDriver;

	// issue #19. No default provider.
	private DatabaseIdProvider databaseIdProvider;

	private Class<? extends VFS> vfs;

	private Cache cache;

	private ObjectFactory objectFactory;

	private ObjectWrapperFactory objectWrapperFactory;

	/**
	 * Sets the ObjectFactory.
	 *
	 * @since 1.1.2
	 * @param objectFactory a custom ObjectFactory
	 */
	public void setObjectFactory(ObjectFactory objectFactory) {
		this.objectFactory = objectFactory;
	}

	/**
	 * Sets the ObjectWrapperFactory.
	 *
	 * @since 1.1.2
	 * @param objectWrapperFactory a specified ObjectWrapperFactory
	 */
	public void setObjectWrapperFactory(ObjectWrapperFactory objectWrapperFactory) {
		this.objectWrapperFactory = objectWrapperFactory;
	}

	/**
	 * Gets the DatabaseIdProvider
	 *
	 * @since 1.1.0
	 * @return a specified DatabaseIdProvider
	 */
	public DatabaseIdProvider getDatabaseIdProvider() {
		return databaseIdProvider;
	}

	/**
	 * Sets the DatabaseIdProvider. As of version 1.2.2 this variable is not initialized by default.
	 *
	 * @since 1.1.0
	 * @param databaseIdProvider a DatabaseIdProvider
	 */
	public void setDatabaseIdProvider(DatabaseIdProvider databaseIdProvider) {
		this.databaseIdProvider = databaseIdProvider;
	}

	/**
	 * Gets the VFS.
	 *
	 * @return a specified VFS
	 */
	public Class<? extends VFS> getVfs() {
		return this.vfs;
	}

	/**
	 * Sets the VFS.
	 *
	 * @param vfs a VFS
	 */
	public void setVfs(Class<? extends VFS> vfs) {
		this.vfs = vfs;
	}

	/**
	 * Gets the Cache.
	 *
	 * @return a specified Cache
	 */
	public Cache getCache() {
		return this.cache;
	}

	/**
	 * Sets the Cache.
	 *
	 * @param cache a Cache
	 */
	public void setCache(Cache cache) {
		this.cache = cache;
	}

	/**
	 * Mybatis plugin list.
	 *
	 * @since 1.0.1
	 *
	 * @param plugins list of plugins
	 *
	 */
	public void setPlugins(Interceptor... plugins) {
		this.plugins = plugins;
	}

	/**
	 * Packages to search for type aliases.
	 *
	 * <p>
	 * Since 2.0.1, allow to specify a wildcard such as {@code com.example.*.model}.
	 *
	 * @since 1.0.1
	 *
	 * @param typeAliasesPackage package to scan for domain objects
	 *
	 */
	public void setTypeAliasesPackage(String typeAliasesPackage) {
		this.typeAliasesPackage = typeAliasesPackage;
	}

	/**
	 * Super class which domain objects have to extend to have a type alias created. No effect if there is no package to scan configured.
	 *
	 * @since 1.1.2
	 *
	 * @param typeAliasesSuperType super class for domain objects
	 *
	 */
	public void setTypeAliasesSuperType(Class<?> typeAliasesSuperType) {
		this.typeAliasesSuperType = typeAliasesSuperType;
	}

	/**
	 * Packages to search for type handlers.
	 *
	 * <p>
	 * Since 2.0.1, allow to specify a wildcard such as {@code com.example.*.typehandler}.
	 *
	 * @since 1.0.1
	 *
	 * @param typeHandlersPackage package to scan for type handlers
	 *
	 */
	public void setTypeHandlersPackage(String typeHandlersPackage) {
		this.typeHandlersPackage = typeHandlersPackage;
	}

	/**
	 * Set type handlers. They must be annotated with {@code MappedTypes} and optionally with {@code MappedJdbcTypes}
	 *
	 * @since 1.0.1
	 *
	 * @param typeHandlers Type handler list
	 */
	public void setTypeHandlers(TypeHandler<?>... typeHandlers) {
		this.typeHandlers = typeHandlers;
	}

	/**
	 * Set the default type handler class for enum.
	 *
	 * @since 2.0.5
	 * @param defaultEnumTypeHandler The default type handler class for enum
	 */
	public void setDefaultEnumTypeHandler(@SuppressWarnings("rawtypes") Class<? extends TypeHandler> defaultEnumTypeHandler) {
		this.defaultEnumTypeHandler = defaultEnumTypeHandler;
	}

	/**
	 * List of type aliases to register. They can be annotated with {@code Alias}
	 *
	 * @since 1.0.1
	 *
	 * @param typeAliases Type aliases list
	 */
	public void setTypeAliases(Class<?>... typeAliases) {
		this.typeAliases = typeAliases;
	}

	/**
	 * If true, a final check is done on Configuration to assure that all mapped statements are fully loaded and there is no one still pending to
	 * resolve includes. Defaults to false.
	 *
	 * @since 1.0.1
	 *
	 * @param failFast enable failFast
	 */
	public void setFailFast(boolean failFast) {
		this.failFast = failFast;
	}

	/**
	 * Set the location of the MyBatis {@code SqlSessionFactory} config file. A typical value is "WEB-INF/mybatis-configuration.xml".
	 *
	 * @param configLocation a location the MyBatis config file
	 */
	public void setConfigLocation(Resource configLocation) {
		this.configLocation = configLocation;
	}

	/**
	 * Set a customized MyBatis configuration.
	 *
	 * @param configuration MyBatis configuration
	 * @since 1.3.0
	 */
	public void setConfiguration(Configuration configuration) {
		this.configuration = configuration;
	}

	/**
	 * Set locations of MyBatis mapper files that are going to be merged into the {@code SqlSessionFactory} configuration at runtime.
	 *
	 * This is an alternative to specifying "&lt;sqlmapper&gt;" entries in an MyBatis config file. This property being based on Spring's resource
	 * abstraction also allows for specifying resource patterns here: e.g. "classpath*:sqlmap/*-mapper.xml".
	 *
	 * @param mapperLocations location of MyBatis mapper files
	 */
	public void setMapperLocations(Resource... mapperLocations) {
		this.mapperLocations = mapperLocations;
	}

	/**
	 * Set optional properties to be passed into the SqlSession configuration, as alternative to a {@code &lt;properties&gt;} tag in the configuration
	 * xml file. This will be used to resolve placeholders in the config file.
	 *
	 * @param sqlSessionFactoryProperties optional properties for the SqlSessionFactory
	 */
	public void setConfigurationProperties(Properties sqlSessionFactoryProperties) {
		this.configurationProperties = sqlSessionFactoryProperties;
	}

	/**
	 * Set the JDBC {@code DataSource} that this instance should manage transactions for. The {@code DataSource} should match the one used by the
	 * {@code SqlSessionFactory}: for example, you could specify the same JNDI DataSource for both.
	 *
	 * A transactional JDBC {@code Connection} for this {@code DataSource} will be provided to application code accessing this {@code DataSource}
	 * directly via {@code DataSourceUtils} or {@code DataSourceTransactionManager}.
	 *
	 * The {@code DataSource} specified here should be the target {@code DataSource} to manage transactions for, not a
	 * {@code TransactionAwareDataSourceProxy}. Only data access code may work with {@code TransactionAwareDataSourceProxy}, while the transaction
	 * manager needs to work on the underlying target {@code DataSource}. If there's nevertheless a {@code TransactionAwareDataSourceProxy} passed in,
	 * it will be unwrapped to extract its target {@code DataSource}.
	 *
	 * @param dataSource a JDBC {@code DataSource}
	 *
	 */
	public void setDataSource(DataSource dataSource) {
		if (dataSource instanceof TransactionAwareDataSourceProxy) {
			// If we got a TransactionAwareDataSourceProxy, we need to perform
			// transactions for its underlying target DataSource, else data
			// access code won't see properly exposed transactions (i.e.
			// transactions for the target DataSource).
			this.dataSource = ((TransactionAwareDataSourceProxy) dataSource).getTargetDataSource();
		} else {
			this.dataSource = dataSource;
		}
	}

	/**
	 * Sets the {@code SqlSessionFactoryBuilder} to use when creating the {@code SqlSessionFactory}.
	 *
	 * This is mainly meant for testing so that mock SqlSessionFactory classes can be injected. By default, {@code SqlSessionFactoryBuilder} creates
	 * {@code DefaultSqlSessionFactory} instances.
	 *
	 * @param sqlSessionFactoryBuilder a SqlSessionFactoryBuilder
	 *
	 */
	public void setSqlSessionFactoryBuilder(SqlSessionFactoryBuilder sqlSessionFactoryBuilder) {
		this.sqlSessionFactoryBuilder = sqlSessionFactoryBuilder;
	}

	/**
	 * Set the MyBatis TransactionFactory to use. Default is {@code SpringManagedTransactionFactory}
	 *
	 * The default {@code SpringManagedTransactionFactory} should be appropriate for all cases: be it Spring transaction management, EJB CMT or plain
	 * JTA. If there is no active transaction, SqlSession operations will execute SQL statements non-transactionally.
	 *
	 * <b>It is strongly recommended to use the default {@code TransactionFactory}.</b> If not used, any attempt at getting an SqlSession through
	 * Spring's MyBatis framework will throw an exception if a transaction is active.
	 *
	 * @see SpringManagedTransactionFactory
	 * @param transactionFactory the MyBatis TransactionFactory
	 */
	public void setTransactionFactory(TransactionFactory transactionFactory) {
		this.transactionFactory = transactionFactory;
	}

	/**
	 * <b>NOTE:</b> This class <em>overrides</em> any {@code Environment} you have set in the MyBatis config file. This is used only as a placeholder
	 * name. The default value is {@code SqlSessionFactoryBean.class.getSimpleName()}.
	 *
	 * @param environment the environment name
	 */
	public void setEnvironment(String environment) {
		this.environment = environment;
	}

	/**
	 * Set scripting language drivers.
	 *
	 * @param scriptingLanguageDrivers scripting language drivers
	 * @since 2.0.2
	 */
	public void setScriptingLanguageDrivers(LanguageDriver... scriptingLanguageDrivers) {
		this.scriptingLanguageDrivers = scriptingLanguageDrivers;
	}

	/**
	 * Set a default scripting language driver class.
	 *
	 * @param defaultScriptingLanguageDriver A default scripting language driver class
	 * @since 2.0.2
	 */
	public void setDefaultScriptingLanguageDriver(Class<? extends LanguageDriver> defaultScriptingLanguageDriver) {
		this.defaultScriptingLanguageDriver = defaultScriptingLanguageDriver;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void afterPropertiesSet() throws Exception {
		notNull(dataSource, "Property 'dataSource' is required");
		notNull(sqlSessionFactoryBuilder, "Property 'sqlSessionFactoryBuilder' is required");
		state((configuration == null && configLocation == null) || !(configuration != null && configLocation != null),
				"Property 'configuration' and 'configLocation' can not specified with together");
		
		this.sqlSessionFactory = buildSqlSessionFactory();
	}

	/**
	 * Build a {@code SqlSessionFactory} instance.
	 *
	 * The default implementation uses the standard MyBatis {@code XMLConfigBuilder} API to build a {@code SqlSessionFactory} instance based on a
	 * Reader. Since 1.3.0, it can be specified a {@link Configuration} instance directly(without config file).
	 *
	 * @return SqlSessionFactory
	 * @throws Exception if configuration is failed
	 */
	protected SqlSessionFactory buildSqlSessionFactory() throws Exception {

		final Configuration targetConfiguration;

		XMLConfigBuilder xmlConfigBuilder = null;
		if (this.configuration != null) {
			targetConfiguration = this.configuration;
			if (targetConfiguration.getVariables() == null) {
				targetConfiguration.setVariables(this.configurationProperties);
			} else if (this.configurationProperties != null) {
				targetConfiguration.getVariables().putAll(this.configurationProperties);
			}
		} else if (this.configLocation != null) {
			xmlConfigBuilder = new XMLConfigBuilder(this.configLocation.getInputStream(), null, this.configurationProperties);
			targetConfiguration = xmlConfigBuilder.getConfiguration();
		} else {
			LOGGER.debug(() -> "Property 'configuration' or 'configLocation' not specified, using default MyBatis Configuration");
			targetConfiguration = new Configuration();
			Optional.ofNullable(this.configurationProperties).ifPresent(targetConfiguration::setVariables);
		}

		Optional.ofNullable(this.objectFactory).ifPresent(targetConfiguration::setObjectFactory);
		Optional.ofNullable(this.objectWrapperFactory).ifPresent(targetConfiguration::setObjectWrapperFactory);
		Optional.ofNullable(this.vfs).ifPresent(targetConfiguration::setVfsImpl);

		if (hasLength(this.typeAliasesPackage)) {
			scanClasses(this.typeAliasesPackage, this.typeAliasesSuperType).stream().filter(clazz -> !clazz.isAnonymousClass())
					.filter(clazz -> !clazz.isInterface()).filter(clazz -> !clazz.isMemberClass())
					.forEach(targetConfiguration.getTypeAliasRegistry()::registerAlias);
		}

		if (!isEmpty(this.typeAliases)) {
			Stream.of(this.typeAliases).forEach(typeAlias -> {
				targetConfiguration.getTypeAliasRegistry().registerAlias(typeAlias);
				LOGGER.debug(() -> "Registered type alias: '" + typeAlias + "'");
			});
		}

		if (!isEmpty(this.plugins)) {
			Stream.of(this.plugins).forEach(plugin -> {
				targetConfiguration.addInterceptor(plugin);
				LOGGER.debug(() -> "Registered plugin: '" + plugin + "'");
			});
		}

		if (hasLength(this.typeHandlersPackage)) {
			scanClasses(this.typeHandlersPackage, TypeHandler.class).stream().filter(clazz -> !clazz.isAnonymousClass())
					.filter(clazz -> !clazz.isInterface()).filter(clazz -> !Modifier.isAbstract(clazz.getModifiers()))
					.forEach(targetConfiguration.getTypeHandlerRegistry()::register);
		}

		if (!isEmpty(this.typeHandlers)) {
			Stream.of(this.typeHandlers).forEach(typeHandler -> {
				targetConfiguration.getTypeHandlerRegistry().register(typeHandler);
				LOGGER.debug(() -> "Registered type handler: '" + typeHandler + "'");
			});
		}

		targetConfiguration.setDefaultEnumTypeHandler(defaultEnumTypeHandler);

		if (!isEmpty(this.scriptingLanguageDrivers)) {
			Stream.of(this.scriptingLanguageDrivers).forEach(languageDriver -> {
				targetConfiguration.getLanguageRegistry().register(languageDriver);
				LOGGER.debug(() -> "Registered scripting language driver: '" + languageDriver + "'");
			});
		}
		Optional.ofNullable(this.defaultScriptingLanguageDriver).ifPresent(targetConfiguration::setDefaultScriptingLanguage);

		if (this.databaseIdProvider != null) {// fix #64 set databaseId before parse mapper xmls
			try {
				targetConfiguration.setDatabaseId(this.databaseIdProvider.getDatabaseId(this.dataSource));
			} catch (SQLException e) {
				throw new NestedIOException("Failed getting a databaseId", e);
			}
		}

		Optional.ofNullable(this.cache).ifPresent(targetConfiguration::addCache);

		if (xmlConfigBuilder != null) {
			try {
				xmlConfigBuilder.parse();
				LOGGER.debug(() -> "Parsed configuration file: '" + this.configLocation + "'");
			} catch (Exception ex) {
				throw new NestedIOException("Failed to parse config resource: " + this.configLocation, ex);
			} finally {
				ErrorContext.instance().reset();
			}
		}

		targetConfiguration.setEnvironment(new Environment(this.environment,
				this.transactionFactory == null ? new SpringManagedTransactionFactory() : this.transactionFactory, this.dataSource));

		// TODO 增加location 获取加载xml的路径，也可配置
		String location = null;
		if (this.mapperLocations != null) {
			if (this.mapperLocations.length == 0) {
				LOGGER.warn(() -> "Property 'mapperLocations' was specified but matching resources are not found.");
			} else {
				for (Resource mapperLocation : this.mapperLocations) {
					if (mapperLocation == null) {
						continue;
					}
					if (location == null) {
						location = mapperLocation.toString();
					}
					try {
						XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(mapperLocation.getInputStream(), targetConfiguration,
								mapperLocation.toString(), targetConfiguration.getSqlFragments());
						xmlMapperBuilder.parse();
					} catch (Exception e) {
						e.printStackTrace(); // 出现错误抛出异常
						throw new NestedIOException("Failed to parse mapping resource: '" + mapperLocation + "'", e);
					} finally {
						ErrorContext.instance().reset();
					}
					LOGGER.debug(() -> "Parsed mapper file: '" + mapperLocation + "'");
				}
			}
		} else {
			LOGGER.debug(() -> "Property 'mapperLocations' was not specified.");
		}

		// TODO 编译sqlsession时，启动定时器
		new org.apache.ibatis.thread.Runnable(location, targetConfiguration).run();

		return this.sqlSessionFactoryBuilder.build(targetConfiguration);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public SqlSessionFactory getObject() throws Exception {
		if (this.sqlSessionFactory == null) {
			afterPropertiesSet();
		}
		return this.sqlSessionFactory;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public Class<? extends SqlSessionFactory> getObjectType() {
		return this.sqlSessionFactory == null ? SqlSessionFactory.class : this.sqlSessionFactory.getClass();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean isSingleton() {
		return true;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void onApplicationEvent(ApplicationEvent event) {
		if (failFast && event instanceof ContextRefreshedEvent) {
			// fail-fast -> check all statements are completed
			this.sqlSessionFactory.getConfiguration().getMappedStatementNames();
		}
	}

	private Set<Class<?>> scanClasses(String packagePatterns, Class<?> assignableType) throws IOException {
		Set<Class<?>> classes = new HashSet<>();
		String[] packagePatternArray = tokenizeToStringArray(packagePatterns, ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS);
		for (String packagePattern : packagePatternArray) {
			Resource[] resources = RESOURCE_PATTERN_RESOLVER.getResources(
					ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + ClassUtils.convertClassNameToResourcePath(packagePattern) + "/**/*.class");
			for (Resource resource : resources) {
				// 注意：这里只扫描 entity 的包
				if (!resource.getURI().toString().contains("entity")) {
					continue;
				}
				try {
					ClassMetadata classMetadata = METADATA_READER_FACTORY.getMetadataReader(resource).getClassMetadata();
					Class<?> clazz = Resources.classForName(classMetadata.getClassName());
					if (assignableType == null || assignableType.isAssignableFrom(clazz)) {
						classes.add(clazz);
					}
				} catch (Throwable e) {
					LOGGER.warn(() -> "Cannot load the '" + resource + "'. Cause by " + e.toString());
				}
			}
		}
		return classes;
	}

	/**
	 * 刷新
	 * @param inputStream
	 * @param resource
	 * @param configuration
	 * @throws NestedIOException
	 */
	public static void refresh(java.io.InputStream inputStream, String resource, Configuration configuration) throws NestedIOException {
		try {
			XMLMapperBuilder xmlMapperBuilder = new XMLMapperBuilder(inputStream, configuration, resource, configuration.getSqlFragments());
			xmlMapperBuilder.parse1();
		} catch (Exception e) {
			throw new NestedIOException("Failed to parse mapping resource: '" + resource + "'", e);
		} finally {
			ErrorContext.instance().reset();
		}

	}

}
